Add API: IsImeOn

This is for GLFW3: glfwGetInputMode (mode: GLFW_IME)

Author: daipom

src/raylib.h

@@ -1112,6 +1112,7 @@ RLAPI int GetCharPressed(void);                               // Get char presse
 RLAPI void SetPreeditCallback(PreeditCallback callback);      // Set a callback for preedit
 RLAPI void SetPreeditCursorRectangle(int x, int y, int w, int h); // Set the preedit cursor area that is used to decide the position of the candidate window
 RLAPI void GetPreeditCursorRectangle(int *x, int *y, int *w, int *h); // Get the preedit cursor area
+RLAPI bool IsImeOn(void);                                     // Check if IME is ON
 
 // Input-related functions: gamepads
 RLAPI bool IsGamepadAvailable(int gamepad);                   // Check if a gamepad is available

src/rcore.c

@@ -3567,6 +3567,13 @@ void GetPreeditCursorRectangle(int *x, int *y, int *w, int *h)
     glfwGetPreeditCursorRectangle(CORE.Window.handle, x, y, w, h);
 }
 
+// Check if IME is ON
+bool IsImeOn(void)
+{
+    if (glfwGetInputMode(CORE.Window.handle, GLFW_IME) == GLFW_TRUE) return true;
+    return false;
+}
+
 // Set a custom key to exit program
 // NOTE: default exitKey is ESCAPE
 void SetExitKey(int key)